Switching unit with password protection

摘要

An input code is made up of a password taken from a sequence of signals. A computer, a screen (6), an operating unit (4,5), signal input (2) and signal output (3) are fitted in a casing (1). Switching functions can be programmed by a user through a menu on the operating unit. An input code can be fed into a reader device with an electronic key such as a magnetic card or a barcode.